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Articles by AmitDiwan
Page 760 of 840
Use UNION ALL to insert records in two tables with a single query in MYSQL
Here is the query to create first table.mysql> create table DemoTable1 -> ( -> StudentName varchar(20), -> StudentMarks int -> ); Query OK, 0 rows affected (0.67 sec)To understand the above concept, let us create second table.mysql> create table DemoTable2 -> ( -> Name varchar(20) -> ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable2 values('Chris'); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −mysql> select * from DemoTable2;This will produce the following output −+-------+ ...
Read MoreIgnore null values in MySQL and display rest of the values
Use IS NOT NULL to find the non-null values and display them. Let us first create a table −mysql> create table DemoTable1458 -> ( -> StudentName varchar(20), -> StudentScore int -> ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1458 values('Chris Brown', 56); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1458 values('David Miller', NULL); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1458 values('John Doe', 78); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable1458 values('Adam Smith', NULL); ...
Read MoreMySQL query to convert timestamp to month?
To convert timestamp to month, use the FROM_UNIXTIME() method as in the below syntax −select month(from_unixtime(yourColumnName)) from yourTableName;Let us first create a table −mysql> create table DemoTable1457 -> ( -> Value bigint -> ); Query OK, 0 rows affected (0.85 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1457 values(1570207117); Query OK, 1 row affected (0.07 sec) mysql> insert into DemoTable1457 values(1548947534); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1457 values(1575213134); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> select * from ...
Read MorePerform MySQL SELECT on fields containing null values?
To check for NULL values in SELECT, use MySQL NULL. Let us first create a table −mysql> create table DemoTable1455 -> ( -> Name varchar(20) -> ); Query OK, 0 rows affected (0.47 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1455 values('John'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable1455 values(NULL); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1455 values(''); Query OK, 1 row affected (0.19 sec)Display all records from the table using select statement −mysql> select * from DemoTable1455;This will produce the following output −+------+ ...
Read MoreMySQL query to get next closest day between two days?
Following is the syntax −select * from yourTableName order by ( yourColumnName> now()) desc, (case when yourColumnName > now() then yourColumnName end) , yourColumnName desc limit 1;Let us first create a table −mysql> create table DemoTable1454 -> ( -> ShippingDate date -> ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1454 values('2019-10-01'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable1454 values('2019-10-03'); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable1454 values('2019-10-05'); Query OK, 1 row affected (0.25 sec) mysql> insert ...
Read MorePrint structured MySQL SELECT at command prompt
To print, the syntax is as follows −mysql -uroot -t -e "your Select Query " -pTo implement the above syntax, let us open the command prompt −Now, reach the MySQL bin −Let us implement the above syntax to easily print structured SQL select. Following is the query −This will produce the following output −
Read MoreCount duplicate ids and display the result in a separate column with MySQL
Let us first create a table −mysql> create table DemoTable1453 -> ( -> CustomerId int, -> CustomerReviewNumber int -> ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1453 values(10, 4); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1453 values(10, 4); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable1453 values(11, 5); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1453 values(11, 5); Query OK, 1 row affected (0.07 sec) mysql> insert into DemoTable1453 values(11, 5); Query OK, 1 ...
Read MoreCount multiple rows and display the result in different columns (and a single row) with MySQL
Let us first create a table −mysql> create table DemoTable1452 -> ( -> FavouriteColor varchar(50) -> ); Query OK, 0 rows affected (2.42 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1452 values('Red'); Query OK, 1 row affected (0.31 sec) mysql> insert into DemoTable1452 values('Yellow'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1452 values('Yellow'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1452 values('Yellow'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable1452 values('Blue'); Query OK, 1 row affected (0.42 sec) mysql> insert into DemoTable1452 values('Blue'); ...
Read MoreHow to update a MySQL date type column?
Let us first create a table −mysql> create table DemoTable1451 -> ( -> JoiningDate date -> ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1451 values('2019-07-21'); Query OK, 1 row affected (0.07 sec) mysql> insert into DemoTable1451 values('2018-01-31'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1451 values('2017-06-01'); Query OK, 1 row affected (0.20 sec)Display all records from the table using select statement −mysql> select * from DemoTable1451;This will produce the following output −+-------------+ | JoiningDate | +-------------+ | 2019-07-21 | | 2018-01-31 | ...
Read MoreDisplay matching repeated date records only once in MySQL
Let’s say we are finding records matching with the current date. Since we want repeated matching records only once, use LIMIT.For example, the current date is −2019-10-02Let us first create a table −mysql> create table DemoTable1450 -> ( -> DueDate date -> ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1450 values('2019-09-30'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1450 values('2019-10-02'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1450 values('2019-10-02'); Query OK, 1 row affected (0.10 sec) mysql> insert into ...
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